gm34063 Gamma Microelectronics, gm34063 Datasheet - Page 5

• Manufacturer Part Number: gm34063
• Description: Gm34063 1.5a Dc-to-dc Converter Control Circuit
• Manufacturer: Gamma Microelectronics

Typical Performance Characteristics
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
400
380
360
340
320
300
280
260
240
220
200
1.4
1.3
1.2
1.1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
2
1
0
1
-55
0
0
Figure 3: Common Emitter Configuration
Output Switch Saturation Voltage versus
Figure 1:Emitter Follows Configuration
V
I
chg
Figure 5: Current Limit Sense Voltage
0.2 0.4 0.6 0.8
CC
MICROELECTRONICS
0.2
-25
= I
Darlington Connection
= 5.0V
A
dischg
T , Ambient Temperature(°C)
0.4
A
versus Temperature
0
Collector Current
I Emitter current (A)
I , Collector Current(A)
E
C
0.6
Output
25
0.8
A
1
50
V
Pin 7 = V
Pins 2, 3, 5 = GND
T = 25°C
A
CC
V
Pin1, 7, 8 =V
Pin 3, 5 = GND
T = 25°C
1.2
1
A
CC
= 5V
75
= 5V
1.2
1.4 1.6 1.8
CC
100
1.4
CC
125
1.6
V
(mV)
1000
1000
CE(sat)
950
900
850
800
750
3.6
3.2
2.8
2.4
1.6
1.2
0.8
0.4
500
200
100
5.0
2.0
50
20
10
Figure 6: Output Switch On- Off Time versus
1.5A DC-to-DC CONVERTER CONTROL CIRCUIT
0.01 0.02 0.05 0.1 0.2
2
0
-40
0
Figure 4: Darlington Configuration Collector
0
Figure 2: Standley Supply Current Versus
V
Pin 7 = V
Pin 5 = GND
T = 25°C
A
CC
Emitter Saturation Voltage (V
5
= 5.0V
Oscillator Timing Capacitor
C , Oscillator Timing Capacitor(nF)
Power Management
0
T
10
CC
V , Supply Voltage (V)
CC
vs Temperature
Supply Voltage
15
40
20
0.5 1.0 2.0
80
t
25
on
C = 1.0 nF
Pin 7 = V
Pin 2 = GND
T
30
V
I = 1A
C
120 T (°C)
CC
CE(sat)
t
off
GM34063
CC
= 5V
35
5.0 10
)
J
40
5